Alright, let's work through 4380 times 9130 step by step
4380 × 9130 = 9130 × (4380)
+ 9130 × 0 that is equal 0
+ 9130 × 80 that is equal 730400
+ 9130 × 300 resulting in 2739000
+ 9130 × 4000 giving us 36520000

= 39989400
